Coupling device.



I H. SCHMlDT.

COUPLING DEVICE.

1,165,541, Patented Dec. 28, 1915.

I 2 EEEEEEEEEEE I- i% H. SCHMIDT.

COUPLING DEVICE.

APPLICATION FILED DEC.28,1911.

1,1655%. P11611191 Dec.28,1915.

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sans scrnvrrnr, or sorter, SCHLESWIG, Germany, assrsnon. TO cnfius'rornWILHELM FERDINAND nerrsnn, or FLENSBURG, GERMANY.

COUPLING DEVICE.

To all whom it may concern: Be it known that I, Hans. SCHMIDT, subjectof the King of Prussia, residing at Siirup, Schleswig, Germany, haveinvented certain new and useful Improvements in Coupling Devices, ofwhich the following is a specification. a

This invention relates to machines for breaking up materials such asfood-cakes for animals, and has for its main object to improve theconstruction of machines of this type. V V

It" is the object to provide means whereby the breaking roller isyieldingly connected to the drive shaft, to permit the roller to yieldwhen the teeth are brought into contact with substance too hard for theteeth to cut or break, and the machine is in danger of being clogged orbroken.

With these objects in view, and others as will hereinafter appear, theinvention will be fully described with reference to the accompanyingdrawings, in which,

Figure 1 is a vertical transverse section through the machine, showingthe grinding roller and its connection to the shaft; Fig. 2 is a similarView in another type of ma chine; Fig. 3 is a transverse section throughthe shaft and roller; Fig. 4: is a transverse section showing a modifiedform of connection, and Figs. 5 and 6 are detail views of parts shown inFig. 4.

A flexible steel band or strap :0 is provided with a wedge-shaped headw, and lies in a groove formed in the interior of the roller d, with thewedge-shaped head hearing between the roller and the shaft 8, theportion which bears on the shaft being rounded and fitted thereto, andthe head proper resting in a recess in the roller and being positionedto be pushed loose from the shaft by backward action of the roller. Theopposite end of the strap a: is threaded and fitted with an adjustingnut n, said nut resting in a socket or recess in the roller cl. 7 Inoperation, the nut is adjusted to the point where the wedge is jammedbetween the shaft and roller tightly enough to cause the shaft to rotatethe roller to break such material as the machine is treating at thetime, but'not hard enough to make the roller turn against stacle to thenormal operation ofthe ma- Specification of Letters Patent.

Application filed December 28, 1911. Serial No. 668,374.

chine, so that the roller is apt to become ammed or broken, a momentaryincreased strain exists on the wedge-part of the annular band. Thisstrain acts first as an in pends itself principally in overcoming thefriction between the band and shaft, since the backward thrust oftheroller acting on the wedge-element, loosens its grip on the shaft andthus frees the roller from its fixed connection to the shaft. Themomentary braking operation is ended by the releasing operation by whichthe frictional engagement of the roller and shaft is overcome. The factthat the wedge is fitted to the periphery of the shaft, but seats in arecess whose side is tangential to the periphery of the shaft causes theroller to hear back on the wedge, when the roller stops,and loosens thegrip of the shaft on the wedge and consequently the roller.

The form shown in Figs. 4; to 6 is a modification of the device in theother figures, and shows a wedge 00 which is fitted to the periphery ofthe shaft and whose outer face bears against a face of the roller whichis tangential to the periphery of the shaft, and further, a buttonhaving a semi-spherical form, and seated by means of the nut n, bearsbetween the farther face of the recess in the roller and the head of thewedge, so

that when the roller isfollowing the rotation of the shaft, the buttoncauses the wedge to bind the roller to the shaft, but when the rollerstops, this pressure is relieved, and the roller is in a position toslip on the shaft.

The operation of the device is evident from the foregoing description,and has been practically set out therein. The machine is adapted tobreak not only the food cake mentioned, but is capable of comminuting orcutting brittle and fibrous substances, and by reason ofthe flexibleconnection between the shaft and the roller, it is readily stopped whenmaterials are encountered which the machine is not adjusted to handle.

Having described my invention, what I claim and desire to secure byLetters Pat- 1. A coupling comprising in combination projectedinto saidrotary member and lying in a recess provided therefor, said Wedgeshapedhead being drawn into. coupling re latlon with said rotary member and sad shaft by the rotation of the :latter.

'.; 2.;*A".c0up1ing: comprising in combination with; a shaft and.amember: to'-- be: rotated 7 thereby, mstrap-surroundingrsaidshaft andhaving one.end -extending tangentially from :saidrsh aft. and through:said memberto be rotated; means securing: said'projecting end to: said,unember tO:" be rotated, whereby the latter will pu'llxthe: strap: tightonsa i d :shaft, the opposite,- end of said xstrap, being provided {witha :head,;.-said head beingseated in a recessstherefor' formed by-.the'surface ofzsaid shaft and awtangential-pocketin said member, -,;sa idahead being adapted '5 to "-be vvedged in said recess between the shaftand d member 7 3; A coupling-comprising in; combination With a shaftanda 'memberto be rotated .therewitli,'said member having a tangentialrecess contiguous to the periphery of-said shaft a strap surroundingsaid shaft, said 'strap being provided With a wedged-head vseatedin-isaid reeesszso that the rotation of the shaft Wedges said head intocoupling relation between the shaft and thesaid memher, an adjustinghead on the opposite: end

of said: stran,- :said iopposite end projecting through said memberwinlsubstantially tangentialnrelation to: saidwshaft and" said adjustinghead 2 having a two-point bearing between said member andsaidiwedgedhead.

-lnltestimony vvhereof I ailix my signature inpresence of .twqwitnesses.

Witnesses i JULIUQ RtiPKE, nMAx= KAnwA.

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